EESchema Schematic File Version 1
LIBS:power,./crystalosc,./atmega8x,device,conn,linear,regul,74xx,cmos4000,adc-dac,memory,xilinx,special,microcontrollers,dsp,microchip,analog_switches,motorola,texas,intel,audio,interface,digital-audio,philips,display,cypress,siliconi,contrib,valves,./switchcontrol.cache
EELAYER 23  0
EELAYER END
$Descr A4 11700 8267
Sheet 1 1
Title "Switch control for a CNC desktop mill"
Date "30 apr 2009"
Rev "1"
Comp "(c) 2009 Michael Buesch <mb@bu3sch.de>"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 5200 6800 0    60   ~
Reset delay
Wire Wire Line
	4500 6450 4650 6450
Connection ~ 6600 6850
Wire Wire Line
	6600 7100 6600 6650
Wire Wire Line
	5850 6450 6300 6450
Wire Wire Line
	10200 5900 8150 5900
Wire Wire Line
	8150 5900 8150 4050
Wire Wire Line
	10200 6300 8350 6300
Wire Wire Line
	8350 6300 8350 3850
Wire Wire Line
	10200 6700 8550 6700
Wire Wire Line
	8550 6700 8550 3650
Wire Wire Line
	10200 4400 10050 4400
Wire Wire Line
	10050 4400 10050 2450
Wire Wire Line
	6850 3500 6850 3250
Wire Wire Line
	6850 3500 7150 3500
Wire Wire Line
	8550 3500 8600 3500
Wire Wire Line
	5350 1650 5350 1400
Wire Wire Line
	9300 2300 8900 2300
Connection ~ 6600 4950
Wire Wire Line
	8050 2300 8050 3000
Wire Wire Line
	8050 2300 8100 2300
Wire Wire Line
	6450 2750 7600 2750
Wire Wire Line
	7600 2750 7600 1350
Wire Wire Line
	7600 1350 8100 1350
Wire Wire Line
	6450 3050 6750 3050
Wire Wire Line
	6750 3050 6750 2900
Wire Wire Line
	6750 2900 7850 2900
Wire Wire Line
	7850 2900 7850 2100
Wire Wire Line
	7850 2100 8100 2100
Connection ~ 2750 3050
Wire Wire Line
	2750 2400 2750 3050
Connection ~ 3150 2900
Wire Wire Line
	3150 2400 3150 2900
Connection ~ 3350 2850
Wire Wire Line
	3350 2400 3350 2850
Connection ~ 3750 2650
Wire Wire Line
	3750 2400 3750 2650
Connection ~ 3550 3250
Wire Wire Line
	3550 3600 3550 3250
Wire Wire Line
	2000 3100 2000 3350
Wire Wire Line
	2000 3100 1350 3100
Wire Wire Line
	3900 2900 3900 950 
Wire Wire Line
	3900 2900 1350 2900
Wire Wire Line
	1350 3300 1850 3300
Wire Wire Line
	1850 3300 1850 3250
Wire Wire Line
	1850 3250 4050 3250
Wire Wire Line
	4050 3150 2300 3150
Wire Wire Line
	1350 2500 2200 2500
Wire Wire Line
	2200 2500 2200 2950
Wire Wire Line
	1350 1700 2100 1700
Wire Wire Line
	2100 1700 2100 2850
Wire Wire Line
	2100 2850 4050 2850
Wire Wire Line
	1900 2750 1900 2100
Wire Wire Line
	1900 2750 4050 2750
Wire Wire Line
	1350 3400 1400 3400
Wire Wire Line
	1350 3000 1400 3000
Wire Wire Line
	1350 2600 1400 2600
Wire Wire Line
	1350 2200 1400 2200
Wire Wire Line
	1350 1800 1400 1800
Wire Wire Line
	2750 1800 2750 1900
Wire Wire Line
	3150 1800 3150 1900
Wire Wire Line
	3550 1800 3550 1900
Wire Wire Line
	3350 4200 3350 4100
Wire Wire Line
	3750 4200 3750 4100
Wire Wire Line
	6750 2650 6750 950 
Wire Wire Line
	6750 2650 6450 2650
Wire Wire Line
	6450 3750 8450 3750
Wire Wire Line
	6450 3950 8250 3950
Wire Wire Line
	6450 4150 8050 4150
Connection ~ 10050 2650
Wire Wire Line
	7350 4950 7450 4950
Wire Wire Line
	6150 1650 6250 1650
Wire Wire Line
	7150 4550 7450 4550
Connection ~ 6600 4250
Wire Wire Line
	6600 4550 6750 4550
Connection ~ 5250 5250
Wire Wire Line
	5450 5050 5450 5250
Wire Wire Line
	5450 5250 5050 5250
Wire Wire Line
	4950 1750 4950 1850
Wire Wire Line
	5150 1850 5150 1650
Wire Wire Line
	5550 1650 5550 1850
Connection ~ 5350 1650
Wire Wire Line
	4950 1250 4950 1350
Wire Wire Line
	5050 5250 5050 5050
Wire Wire Line
	6750 4250 6450 4250
Wire Wire Line
	7400 4250 7250 4250
Wire Wire Line
	6850 3250 6450 3250
Wire Wire Line
	5150 1650 5750 1650
Connection ~ 5550 1650
Wire Wire Line
	6600 4950 6750 4950
Connection ~ 6600 4550
Wire Wire Line
	9650 2500 9650 2800
Connection ~ 9650 2650
Wire Wire Line
	8150 4050 6450 4050
Wire Wire Line
	8350 3850 6450 3850
Wire Wire Line
	8550 3650 6450 3650
Wire Wire Line
	3550 4200 3550 4100
Wire Wire Line
	3750 1800 3750 1900
Wire Wire Line
	3350 1800 3350 1900
Wire Wire Line
	2950 1800 2950 1900
Wire Wire Line
	1350 2000 1400 2000
Wire Wire Line
	1350 2400 1400 2400
Wire Wire Line
	1350 2800 1400 2800
Wire Wire Line
	1350 3200 1400 3200
Wire Wire Line
	1350 1900 2000 1900
Wire Wire Line
	2000 1900 2000 2650
Wire Wire Line
	2000 2650 4050 2650
Wire Wire Line
	1900 2100 1350 2100
Wire Wire Line
	2200 2950 4050 2950
Wire Wire Line
	1350 2700 1850 2700
Wire Wire Line
	1850 2700 1850 3050
Wire Wire Line
	1850 3050 4050 3050
Wire Wire Line
	2300 3150 2300 2300
Wire Wire Line
	2300 2300 1350 2300
Wire Wire Line
	2000 3350 4050 3350
Wire Wire Line
	6750 950  3900 950 
Wire Wire Line
	3750 3600 3750 3350
Connection ~ 3750 3350
Wire Wire Line
	3350 3600 3350 3150
Connection ~ 3350 3150
Wire Wire Line
	3550 2400 3550 2750
Connection ~ 3550 2750
Wire Wire Line
	2950 2400 2950 2950
Connection ~ 2950 2950
Wire Wire Line
	6450 3150 6850 3150
Wire Wire Line
	6850 3150 6850 3000
Wire Wire Line
	6850 3000 7950 3000
Wire Wire Line
	7950 3000 7950 2200
Wire Wire Line
	7950 2200 8100 2200
Wire Wire Line
	8900 2200 9050 2200
Wire Wire Line
	9050 2200 9050 2800
Wire Wire Line
	9050 2800 6650 2800
Wire Wire Line
	6650 2800 6650 2950
Wire Wire Line
	6650 2950 6450 2950
Wire Wire Line
	8000 1550 8100 1550
Wire Wire Line
	8900 2100 9250 2100
Wire Wire Line
	5250 5250 5250 5500
Wire Wire Line
	7100 3200 7150 3200
Wire Wire Line
	8050 3000 9050 3000
Wire Wire Line
	9050 3000 9050 5350
Wire Wire Line
	9050 5350 6600 5350
Wire Wire Line
	10200 4600 9650 4600
Wire Wire Line
	9650 4600 9650 3300
Wire Wire Line
	8450 3750 8450 6500
Wire Wire Line
	8450 6500 10200 6500
Wire Wire Line
	8250 3950 8250 6100
Wire Wire Line
	8250 6100 10200 6100
Wire Wire Line
	8050 4150 8050 5700
Wire Wire Line
	8050 5700 10200 5700
Wire Wire Line
	6100 6850 6100 6450
Connection ~ 6100 6450
Wire Wire Line
	5350 6450 5050 6450
Wire Wire Line
	6600 6250 6600 4250
Connection ~ 6600 5350
$Comp
L +5V #PWR19
U 1 1 49F9D360
P 4500 6450
F 0 "#PWR19" H 4500 6540 20  0001 C C
F 1 "+5V" H 4500 6540 30  0000 C C
	1    4500 6450
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR24
U 1 1 49F9D344
P 6600 7100
F 0 "#PWR24" H 6600 7100 30  0001 C C
F 1 "GND" H 6600 7030 30  0001 C C
	1    6600 7100
	1    0    0    -1  
$EndComp
$Comp
L C C5
U 1 1 49F9D313
P 4850 6450
F 0 "C5" H 4900 6550 50  0000 L C
F 1 "100uF" H 4900 6350 50  0000 L C
	1    4850 6450
	0    1    1    0   
$EndComp
$Comp
L R R12
U 1 1 49F9D30B
P 5600 6450
F 0 "R12" V 5680 6450 50  0000 C C
F 1 "4.7k" V 5600 6450 50  0000 C C
	1    5600 6450
	0    1    1    0   
$EndComp
$Comp
L R R13
U 1 1 49F9D303
P 6350 6850
F 0 "R13" V 6430 6850 50  0000 C C
F 1 "47k" V 6350 6850 50  0000 C C
	1    6350 6850
	0    1    1    0   
$EndComp
$Comp
L NPN Q1
U 1 1 49F9D2F6
P 6500 6450
F 0 "Q1" H 6650 6450 50  0000 C C
F 1 "BC547" H 6402 6600 50  0000 C C
	1    6500 6450
	1    0    0    -1  
$EndComp
NoConn ~ 10200 4300
NoConn ~ 10200 6000
NoConn ~ 10200 6200
NoConn ~ 10200 6400
NoConn ~ 10200 6600
NoConn ~ 8550 3200
$Comp
L +5V #PWR30
U 1 1 49A30BC6
P 8600 3500
F 0 "#PWR30" H 8600 3590 20  0001 C C
F 1 "+5V" H 8600 3590 30  0000 C C
	1    8600 3500
	0    1    1    0   
$EndComp
$Comp
L GND #PWR25
U 1 1 49A30BBE
P 7100 3200
F 0 "#PWR25" H 7100 3200 30  0001 C C
F 1 "GND" H 7100 3130 30  0001 C C
	1    7100 3200
	0    1    1    0   
$EndComp
$Comp
L CRYSTALOSC X1
U 1 1 49A30B95
P 7850 3350
F 0 "X1" H 7850 3050 60  0000 C C
F 1 "20MHz" H 7850 3350 60  0000 C C
	1    7850 3350
	-1   0    0    1   
$EndComp
$Comp
L ATMEGA8-16PI I1
U 1 1 498EDA00
P 5250 3400
F 0 "I1" H 5950 4800 60  0000 C C
F 1 "ATMEGA88" H 5900 1950 60  0000 C C
	1    5250 3400
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR32
U 1 1 498EB42B
P 9300 2300
F 0 "#PWR32" H 9300 2300 30  0001 C C
F 1 "GND" H 9300 2230 30  0001 C C
	1    9300 2300
	0    -1   -1   0   
$EndComp
$Comp
L +5V #PWR31
U 1 1 498EB424
P 9250 2100
F 0 "#PWR31" H 9250 2190 20  0001 C C
F 1 "+5V" H 9250 2190 30  0000 C C
	1    9250 2100
	0    1    1    0   
$EndComp
$Comp
L GND #PWR29
U 1 1 498EB373
P 8000 1550
F 0 "#PWR29" H 8000 1550 30  0001 C C
F 1 "GND" H 8000 1480 30  0001 C C
	1    8000 1550
	0    1    1    0   
$EndComp
$Comp
L CONN_2 P1
U 1 1 498EB34F
P 8450 1450
F 0 "P1" V 8400 1450 40  0000 C C
F 1 "DEBUG" V 8500 1450 40  0000 C C
	1    8450 1450
	1    0    0    -1  
$EndComp
NoConn ~ 6450 2850
NoConn ~ 6450 3350
NoConn ~ 10200 5800
NoConn ~ 10200 5600
NoConn ~ 10200 5500
NoConn ~ 10200 5400
NoConn ~ 10200 5300
NoConn ~ 10200 5200
NoConn ~ 10200 5100
NoConn ~ 10200 5000
NoConn ~ 10200 4900
NoConn ~ 10200 4800
NoConn ~ 10200 4700
NoConn ~ 10200 4500
NoConn ~ 1350 4100
NoConn ~ 1350 4000
NoConn ~ 1350 3900
NoConn ~ 1350 3800
NoConn ~ 1350 3700
NoConn ~ 1350 3600
NoConn ~ 1350 3500
$Comp
L GND #PWR9
U 1 1 498EAE81
P 1400 3400
F 0 "#PWR9" H 1400 3400 30  0001 C C
F 1 "GND" H 1400 3330 30  0001 C C
	1    1400 3400
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR8
U 1 1 498EAE77
P 1400 3200
F 0 "#PWR8" H 1400 3200 30  0001 C C
F 1 "GND" H 1400 3130 30  0001 C C
	1    1400 3200
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR7
U 1 1 498EAE72
P 1400 3000
F 0 "#PWR7" H 1400 3000 30  0001 C C
F 1 "GND" H 1400 2930 30  0001 C C
	1    1400 3000
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR6
U 1 1 498EAE6A
P 1400 2800
F 0 "#PWR6" H 1400 2800 30  0001 C C
F 1 "GND" H 1400 2730 30  0001 C C
	1    1400 2800
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR5
U 1 1 498EAE66
P 1400 2600
F 0 "#PWR5" H 1400 2600 30  0001 C C
F 1 "GND" H 1400 2530 30  0001 C C
	1    1400 2600
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR4
U 1 1 498EAE5E
P 1400 2400
F 0 "#PWR4" H 1400 2400 30  0001 C C
F 1 "GND" H 1400 2330 30  0001 C C
	1    1400 2400
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR3
U 1 1 498EAE57
P 1400 2200
F 0 "#PWR3" H 1400 2200 30  0001 C C
F 1 "GND" H 1400 2130 30  0001 C C
	1    1400 2200
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR2
U 1 1 498EAE53
P 1400 2000
F 0 "#PWR2" H 1400 2000 30  0001 C C
F 1 "GND" H 1400 1930 30  0001 C C
	1    1400 2000
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR1
U 1 1 498EAE46
P 1400 1800
F 0 "#PWR1" H 1400 1800 30  0001 C C
F 1 "GND" H 1400 1730 30  0001 C C
	1    1400 1800
	0    -1   -1   0   
$EndComp
$Comp
L +5V #PWR14
U 1 1 498EAD13
P 3350 4200
F 0 "#PWR14" H 3350 4290 20  0001 C C
F 1 "+5V" H 3350 4290 30  0000 C C
	1    3350 4200
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR16
U 1 1 498EAD0F
P 3550 4200
F 0 "#PWR16" H 3550 4290 20  0001 C C
F 1 "+5V" H 3550 4290 30  0000 C C
	1    3550 4200
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR18
U 1 1 498EAD09
P 3750 4200
F 0 "#PWR18" H 3750 4290 20  0001 C C
F 1 "+5V" H 3750 4290 30  0000 C C
	1    3750 4200
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR10
U 1 1 498EAD02
P 2750 1800
F 0 "#PWR10" H 2750 1890 20  0001 C C
F 1 "+5V" H 2750 1890 30  0000 C C
	1    2750 1800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR11
U 1 1 498EACFF
P 2950 1800
F 0 "#PWR11" H 2950 1890 20  0001 C C
F 1 "+5V" H 2950 1890 30  0000 C C
	1    2950 1800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR12
U 1 1 498EACFC
P 3150 1800
F 0 "#PWR12" H 3150 1890 20  0001 C C
F 1 "+5V" H 3150 1890 30  0000 C C
	1    3150 1800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR13
U 1 1 498EACF8
P 3350 1800
F 0 "#PWR13" H 3350 1890 20  0001 C C
F 1 "+5V" H 3350 1890 30  0000 C C
	1    3350 1800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR15
U 1 1 498EACF3
P 3550 1800
F 0 "#PWR15" H 3550 1890 20  0001 C C
F 1 "+5V" H 3550 1890 30  0000 C C
	1    3550 1800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR17
U 1 1 498EACEF
P 3750 1800
F 0 "#PWR17" H 3750 1890 20  0001 C C
F 1 "+5V" H 3750 1890 30  0000 C C
	1    3750 1800
	1    0    0    -1  
$EndComp
$Comp
L R R5
U 1 1 498EACC2
P 3350 3850
F 0 "R5" V 3430 3850 50  0000 C C
F 1 "1k" V 3350 3850 50  0000 C C
	1    3350 3850
	1    0    0    -1  
$EndComp
$Comp
L R R7
U 1 1 498EACBE
P 3550 3850
F 0 "R7" V 3630 3850 50  0000 C C
F 1 "1k" V 3550 3850 50  0000 C C
	1    3550 3850
	1    0    0    -1  
$EndComp
$Comp
L R R9
U 1 1 498EACAD
P 3750 3850
F 0 "R9" V 3830 3850 50  0000 C C
F 1 "1k" V 3750 3850 50  0000 C C
	1    3750 3850
	1    0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 498EAC92
P 2750 2150
F 0 "R1" V 2830 2150 50  0000 C C
F 1 "1k" V 2750 2150 50  0000 C C
	1    2750 2150
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 498EAC8C
P 2950 2150
F 0 "R2" V 3030 2150 50  0000 C C
F 1 "1k" V 2950 2150 50  0000 C C
	1    2950 2150
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 498EAC87
P 3150 2150
F 0 "R3" V 3230 2150 50  0000 C C
F 1 "1k" V 3150 2150 50  0000 C C
	1    3150 2150
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 498EAC82
P 3350 2150
F 0 "R4" V 3430 2150 50  0000 C C
F 1 "1k" V 3350 2150 50  0000 C C
	1    3350 2150
	1    0    0    -1  
$EndComp
$Comp
L R R6
U 1 1 498EAC76
P 3550 2150
F 0 "R6" V 3630 2150 50  0000 C C
F 1 "1k" V 3550 2150 50  0000 C C
	1    3550 2150
	1    0    0    -1  
$EndComp
$Comp
L R R8
U 1 1 498EAC70
P 3750 2150
F 0 "R8" V 3830 2150 50  0000 C C
F 1 "1k" V 3750 2150 50  0000 C C
	1    3750 2150
	1    0    0    -1  
$EndComp
Text Label 1450 2900 0    31   ~
Z reference
Text Label 1450 3300 0    31   ~
Z limit
Text Label 1450 3100 0    31   ~
Z limit
Text Label 1450 2300 0    31   ~
Y reference
Text Label 1450 2700 0    31   ~
Y limit
Text Label 1450 2500 0    31   ~
Y limit
Text Label 1450 1700 0    31   ~
X reference
Text Label 1450 2100 0    31   ~
X limit
Text Label 1450 1900 0    31   ~
X limit
Text Label 9350 6700 0    50   ~
Z reference
Text Label 9350 6500 0    50   ~
Z limit
Text Label 9350 6300 0    50   ~
Y reference
Text Label 9350 6100 0    50   ~
Y limit
Text Label 9350 5900 0    50   ~
X reference
Text Label 9350 5700 0    50   ~
X limit
$Comp
L GND #PWR34
U 1 1 498EA8D5
P 10050 2450
F 0 "#PWR34" H 10050 2450 30  0001 C C
F 1 "GND" H 10050 2380 30  0001 C C
	1    10050 2450
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR33
U 1 1 498EA8D0
P 9650 2500
F 0 "#PWR33" H 9650 2590 20  0001 C C
F 1 "+5V" H 9650 2590 30  0000 C C
	1    9650 2500
	1    0    0    -1  
$EndComp
Text Label 10050 3750 1    60   ~
GND
Text Label 9650 3750 1    60   ~
VCC
$Comp
L C C4
U 1 1 498EA625
P 9850 2650
F 0 "C4" H 9900 2750 50  0000 L C
F 1 "10u" H 9900 2550 50  0000 L C
	1    9850 2650
	0    1    1    0   
$EndComp
$Comp
L R R11
U 1 1 498EA622
P 9650 3050
F 0 "R11" V 9730 3050 50  0000 C C
F 1 "1" V 9650 3050 50  0000 C C
	1    9650 3050
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR28
U 1 1 498EA508
P 7450 4950
F 0 "#PWR28" H 7450 4950 30  0001 C C
F 1 "GND" H 7450 4880 30  0001 C C
	1    7450 4950
	0    -1   -1   0   
$EndComp
$Comp
L SW_PUSH SW1
U 1 1 498EA4EB
P 7050 4950
F 0 "SW1" H 7200 5060 50  0000 C C
F 1 "RESET_SW" H 7050 4870 50  0000 C C
	1    7050 4950
	1    0    0    -1  
$EndComp
$Comp
L DB25 J1
U 1 1 498E18B4
P 900 2900
F 0 "J1" H 950 4250 70  0000 C C
F 1 "To Machine" H 850 1550 70  0000 C C
	1    900  2900
	-1   0    0    1   
$EndComp
$Comp
L DB25 J2
U 1 1 498E18A6
P 10650 5500
F 0 "J2" H 10700 6850 70  0000 C C
F 1 "To CNC control" H 10600 4150 70  0000 C C
	1    10650 5500
	1    0    0    -1  
$EndComp
$Comp
L CONN_3X2 P2
U 1 1 498E17B8
P 8500 2250
F 0 "P2" H 8500 2500 50  0000 C C
F 1 "ISP" V 8500 2300 40  0000 C C
	1    8500 2250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR23
U 1 1 498E1776
P 6250 1650
F 0 "#PWR23" H 6250 1650 30  0001 C C
F 1 "GND" H 6250 1580 30  0001 C C
	1    6250 1650
	0    -1   -1   0   
$EndComp
$Comp
L C C2
U 1 1 498E16E0
P 5950 1650
F 0 "C2" H 6000 1750 50  0000 L C
F 1 "220u" H 6000 1550 50  0000 L C
	1    5950 1650
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR27
U 1 1 498E15A1
P 7450 4550
F 0 "#PWR27" H 7450 4550 30  0001 C C
F 1 "GND" H 7450 4480 30  0001 C C
	1    7450 4550
	0    -1   -1   0   
$EndComp
$Comp
L +5V #PWR26
U 1 1 498E159B
P 7400 4250
F 0 "#PWR26" H 7400 4340 20  0001 C C
F 1 "+5V" H 7400 4340 30  0000 C C
	1    7400 4250
	0    1    1    0   
$EndComp
$Comp
L C C3
U 1 1 498E1589
P 6950 4550
F 0 "C3" H 7000 4650 50  0000 L C
F 1 "47p" H 7000 4450 50  0000 L C
	1    6950 4550
	0    1    1    0   
$EndComp
$Comp
L R R10
U 1 1 498E157D
P 7000 4250
F 0 "R10" V 7080 4250 50  0000 C C
F 1 "1k" V 7000 4250 50  0000 C C
	1    7000 4250
	0    1    1    0   
$EndComp
NoConn ~ 4050 3950
NoConn ~ 4050 3850
$Comp
L GND #PWR21
U 1 1 498E154D
P 5250 5500
F 0 "#PWR21" H 5250 5500 30  0001 C C
F 1 "GND" H 5250 5430 30  0001 C C
	1    5250 5500
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR20
U 1 1 498E150F
P 4950 1250
F 0 "#PWR20" H 4950 1250 30  0001 C C
F 1 "GND" H 4950 1180 30  0001 C C
	1    4950 1250
	-1   0    0    1   
$EndComp
$Comp
L C C1
U 1 1 498E1505
P 4950 1550
F 0 "C1" H 5000 1650 50  0000 L C
F 1 "47p" H 5000 1450 50  0000 L C
	1    4950 1550
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR22
U 1 1 498E14F2
P 5350 1400
F 0 "#PWR22" H 5350 1490 20  0001 C C
F 1 "+5V" H 5350 1490 30  0000 C C
	1    5350 1400
	1    0    0    -1  
$EndComp
$EndSCHEMATC
